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CO-GUIDED BY SUB-GUIDED BY
MS. UZMA DILSHAD MR. SONKER
DEPARTMENT OF CIVIL ENGG.
PRESENTED BYSUSHILE KUMAR VERMA CE
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Introduction
UASB technology
Flow Diagram
Design Parameters Brief Description of units
Screen
Grit Chamber
UASB ReactorChlorine contact tank
Conclusion
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One of Asia's largest sewage treatment plants built at
Bharwara Sewage Treatment plant in Gomti Nagar
Lucknow .
It is been design for the capacity 345 mld and extended in
area about120 hectare land.
The plants is basically based on the technology of up flow
Anaerobic Sludge blanket Technology [UASBR]
The plant is reduces Toxic level of waste water i.e reduces
factor like as BOD, ph ,sulphide & fluoride contents.
Work on the Rs 169 crore STP was started by Jal Nigam in
July 2008 and originally, the project was to be completed
within a year.
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UASB technology is based onAnaerobic process.
3-phase seperation device is themost characteristics feature of UASBreactor.
Wastewater flows upwards through a
sludge blanket located in lower partof reactor, while upper part containsa three phase (solid, liquid, gas)separation system.
It facilitates the collection of biogasand also provides internal recycling of
sludge by disengaging adherent biogasbubbles from rising sludge particles. Superior settling characteristics ofgranular sludge allows higher sludgeconcentrations and consequentlypermitted.
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Design average flow
345mld
Peak factor
1.50
S.NO. PARAMETER INFLUENT
EFFLUENT
1. Total suspended solids mg/l 300-606
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Screening is the first unitoperation used atwastewater treatmentplants.
Pre-treatment is done insceens and grit chamber.
Screening removes objectssuch as rags, paper,plastics, and metals to
prevent damage andclogging of downstreamequipment, piping, andappurtenances.
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Grit is sewage consist of coarse particle of sand, ash and clinkers,eggshells, bone chips and many inert material inorganic in nature.
Grit chamber consists of a cylindrical tank in which the flow enterstangentially, creating a vortex flow pattern.
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The effluent received after polishingpond will be disinfectant in chlorinetank with a dose of approx 5 mg/l ofchlorine gas dosing.
The chlorine contact time has beenkept about 30 minutes .
The chlorine gas is contact with thetreat the sewage and will be capableto remove the faecal coliform bychemical reaction.
It is hoped that MNP will reducebelow 10000 per hundred ml by theapplication of chlorine gas.
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Pre aeration tank has been
produced to aerate the effluent
from UASB rector to release
the trapped gases. Aeration will
remove sulphide. The pre
aeration may also be useful to
change the anaerobic nature of
effluent of UASB to aerobic.
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After the commissioning of 345 mld STP at Lucknow it is
hoped at the Gomti river will get rid of pollution of wastewater of nallas that effect the health of Gomti river will
improve with the increase of Dissolved oxygen in the river
and not only the life of Lucknow will improve but also
aquatic life will survive in Gomti, the life line of Lucknow.
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FOR GIVING ME AVALUABLE TIME